Cascade Amplifier

In Multi-stage amplifiers, the output of the first stage is coupled to the input of the next stage using a coupling device. These coupling devices can usually be a capacitor or a transformer. This process of joining two amplifier stages using a coupling device can be called Cascading a two-port network designed with amplifiers that are connected in series when every amplifier transmits its o/p to the input of the second amplifier in a daisy chain. The problem in measuring the gain of the cascaded stage is the non-perfect coupling among the two stages because of the loading